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Electric Peak Larkspur - Delphinium glaucescens

Potential Species of Concern
Native Species

Global Rank: G3G4
State Rank: S3S4
(see State Rank Reason below)

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

External Links






State Rank Reason (see State Rank above)
Occurs in southwest Montana at relatively high elevations. Though it has a restricted distribution, it may not be that uncommon.
  • Details on Status Ranking and Review
    Electric Peak Larkspur (Delphinium glaucescens) Conservation Status Review
    Review Date = 10/31/2012
    View State Conservation Rank Criteria
    Population Size

    Score0-1 - Moderate to Large: Population size is imprecisely known but is believed to be >10,000 individuals.

    CommentPopulation levels are poorly documented.

    Range Extent

    Score2 - Regional or State Endemic or Small Montana Range: Generally restricted to an area <100,000 sq. miles (equivalent to 2/3 the size of Montana or less) or Montana contributes 50% or more of the species’ range or populations OR limited to 2-3 Sub-basins in Montana.

    Area of Occupancy

    Score1 - Moderate: Generally occurring in 11-25 Subwatersheds (6th Code HUC’s).

    CommentCurrently documented from 18 subwatersheds (6th code HUC), though likely occurs in more within sw Montana.

    Environmental Specificity

    Score1 - Moderate: Species is restricted to a specific habitat that is more widely distributed or to several restricted habitats and is typically dependent upon relatively unaltered, good-quality habitat (C Values of 5-7).

    Trends

    Score0-1 - Stable to Minor Declines:

    CommentTrends unknown, though populations are likely stable or experiencing only minor declines as its' habitat at higher elevations is less impacted.

    Threats

    Score0-1 - Low to Medium.

    CommentThreats are probably minimal across the species' range.

    Intrinsic Vulnerability

    Score0-1 - Low to Moderate Vulnerability.

    Raw Conservation Status Score

    Score 4 to 8 total points scored out of a possible 19.

 
General Description
Stems hollow near the base, glabrous, glaucous, 25–60 cm from woody roots. Leaves numerous; blades 4–8 cm wide; ultimate lobes narrow, to 3 mm wide. Inflorescence with usually <30 flowers, most longer than their pedicels. Flowers with dark blue, nearly glabrous sepals 6–12 mm long, the tips cupped forward; petals deep blue, the upper with white margins, the lower cleft 1–2 mm long. Fruits 10–15 mm long, glabrous to puberulent (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range

Year-round
 


Range Comments
Endemic to northwest WY and adjacent ID and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 29

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Meadows, grasslands, steppe; montane to near treeline (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Ecology
POLLINATORS
The following animal species have been reported as pollinators of this species or genera where their geographic ranges overlap: Bombus vagans, Bombus appositus, Bombus auricomus, Bombus borealis, Bombus centralis, Bombus fervidus, Bombus flavifrons, Bombus mixtus, Bombus occidentalis, Bombus pensylvanicus, Bombus griseocollis, Bombus impatiens, and Bombus kirbiellus (Plath 1934, Macior 1974, Bauer 1983, Thorp et al. 1983, Wilson et al. 2010, Colla and Dumesh 2010, Koch et al. 2012, Pyke et al. 2012, Miller-Struttmann and Galen 2014, Williams et al. 2014).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Bauer, P.J. 1983. Bumblebee pollination relationships on the Beartooth Plateau tundra of Southern Montana. American Journal of Botany. 70(1): 134-144.
    • Colla, S.R. and S. Dumesh. 2010. The bumble bees of southern Ontario: notes on natural history and distribution. Journal of the Entomological Society of Ontario 141: 39-68.
    • Koch, J., J. Strange, and P. Williams. 2012. Bumble bees of the western United States. Washington, DC: USDA Forest Service, Pollinator Partnership. 143 p.
    • Macior, L.M. 1974. Pollination ecology of the Front Range of the Colorado Rocky Mountains. Melanderia 15: 1-59.
    • Miller-Struttmann, N.E. and C. Galen. 2014. High-altitude multi-taskers: bumble bee food plant use broadens along an altitudinal productivity gradient. Oecologia 176:1033-1045.
    • Plath, O.E. 1934. Bumblebees and their ways. New York, NY: Macmillan Company. 201 p.
    • Pyke, G.H., D.W. Inouye, and J.D. Thomson. 2012. Local geographic distributions of bumble bees near Crested Butte, Colorado: competition and community structure revisited. Environmental Entomology 41(6): 1332-1349.
    • Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
    • Williams, P., R. Thorp, L. Richardson, and S. Colla. 2014. Bumble Bees of North America. Princeton, NJ. Princeton University Press.
    • Wilson, J.S., L.E. Wilson, L.D. Loftis, and T. Griswold. 2010. The montane bee fauna of north central Washington, USA, with floral associations. Western North American Naturalist 70(2): 198-207.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • King, C. R. 1953. The Ranunculaceae of Montana. M.S. Thesis, Bozeman, MT: Montana State College. 82 p.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Sawyer, P.T. 1967. Biosystematic studies of species of delphinium occurring in Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 56 p.
    • Sawyer, P.T. 1970. Systematic studies of non-fistulose delphinium taxa common to Montana. Ph.D. Dissertation. Bozeman, MT: Montana State University. 84 p.
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Citation for data on this website:
Electric Peak Larkspur — Delphinium glaucescens.  Montana Field Guide.  .  Retrieved on , from